Merge "Separate namespace acquisition from library loading"
diff --git a/libnativeloader/include/nativeloader/native_loader.h b/libnativeloader/include/nativeloader/native_loader.h
index 3563fc1..19a1783 100644
--- a/libnativeloader/include/nativeloader/native_loader.h
+++ b/libnativeloader/include/nativeloader/native_loader.h
@@ -53,8 +53,21 @@
#if defined(__ANDROID__)
// Look up linker namespace by class_loader. Returns nullptr if
// there is no namespace associated with the class_loader.
+// TODO(b/79940628): move users to FindNativeLoaderNamespaceByClassLoader and remove this function.
__attribute__((visibility("default")))
android_namespace_t* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader);
+// That version works with native bridge namespaces, but requires use of OpenNativeLibrary.
+class NativeLoaderNamespace;
+__attribute__((visibility("default")))
+NativeLoaderNamespace* FindNativeLoaderNamespaceByClassLoader(
+ JNIEnv* env, jobject class_loader);
+// Load library. Unlinke OpenNativeLibrary above couldn't create namespace on demand, but does
+// not require access to JNIEnv either.
+__attribute__((visibility("default")))
+void* OpenNativeLibrary(NativeLoaderNamespace* ns,
+ const char* path,
+ bool* needs_native_bridge,
+ std::string* error_msg);
#endif
__attribute__((visibility("default")))
diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
index 7fef106..67c1c10 100644
--- a/libnativeloader/native_loader.cpp
+++ b/libnativeloader/native_loader.cpp
@@ -29,6 +29,7 @@
#include "nativebridge/native_bridge.h"
#include <algorithm>
+#include <list>
#include <memory>
#include <mutex>
#include <string>
@@ -150,15 +151,14 @@
public:
LibraryNamespaces() : initialized_(false) { }
- bool Create(JNIEnv* env,
- uint32_t target_sdk_version,
- jobject class_loader,
- bool is_shared,
- bool is_for_vendor,
- jstring java_library_path,
- jstring java_permitted_path,
- NativeLoaderNamespace* ns,
- std::string* error_msg) {
+ NativeLoaderNamespace* Create(JNIEnv* env,
+ uint32_t target_sdk_version,
+ jobject class_loader,
+ bool is_shared,
+ bool is_for_vendor,
+ jstring java_library_path,
+ jstring java_permitted_path,
+ std::string* error_msg) {
std::string library_path; // empty string by default.
if (java_library_path != nullptr) {
@@ -182,10 +182,10 @@
}
if (!initialized_ && !InitPublicNamespace(library_path.c_str(), error_msg)) {
- return false;
+ return nullptr;
}
- bool found = FindNamespaceByClassLoader(env, class_loader, nullptr);
+ bool found = FindNamespaceByClassLoader(env, class_loader);
LOG_ALWAYS_FATAL_IF(found,
"There is already a namespace associated with this classloader");
@@ -199,13 +199,12 @@
namespace_type |= ANDROID_NAMESPACE_TYPE_GREYLIST_ENABLED;
}
- NativeLoaderNamespace parent_ns;
- bool found_parent_namespace = FindParentNamespaceByClassLoader(env, class_loader, &parent_ns);
+ NativeLoaderNamespace* parent_ns = FindParentNamespaceByClassLoader(env, class_loader);
bool is_native_bridge = false;
- if (found_parent_namespace) {
- is_native_bridge = !parent_ns.is_android_namespace();
+ if (parent_ns != nullptr) {
+ is_native_bridge = !parent_ns->is_android_namespace();
} else if (!library_path.empty()) {
is_native_bridge = NativeBridgeIsPathSupported(library_path.c_str());
}
@@ -251,15 +250,17 @@
NativeLoaderNamespace native_loader_ns;
if (!is_native_bridge) {
+ android_namespace_t* android_parent_ns =
+ parent_ns == nullptr ? nullptr : parent_ns->get_android_ns();
android_namespace_t* ns = android_create_namespace(namespace_name,
nullptr,
library_path.c_str(),
namespace_type,
permitted_path.c_str(),
- parent_ns.get_android_ns());
+ android_parent_ns);
if (ns == nullptr) {
*error_msg = dlerror();
- return false;
+ return nullptr;
}
// Note that when vendor_ns is not configured this function will return nullptr
@@ -269,49 +270,50 @@
if (!android_link_namespaces(ns, nullptr, system_exposed_libraries.c_str())) {
*error_msg = dlerror();
- return false;
+ return nullptr;
}
if (vndk_ns != nullptr && !system_vndksp_libraries_.empty()) {
// vendor apks are allowed to use VNDK-SP libraries.
if (!android_link_namespaces(ns, vndk_ns, system_vndksp_libraries_.c_str())) {
*error_msg = dlerror();
- return false;
+ return nullptr;
}
}
if (!vendor_public_libraries_.empty()) {
if (!android_link_namespaces(ns, vendor_ns, vendor_public_libraries_.c_str())) {
*error_msg = dlerror();
- return false;
+ return nullptr;
}
}
native_loader_ns = NativeLoaderNamespace(ns);
} else {
+ native_bridge_namespace_t* native_bridge_parent_namespace =
+ parent_ns == nullptr ? nullptr : parent_ns->get_native_bridge_ns();
native_bridge_namespace_t* ns = NativeBridgeCreateNamespace(namespace_name,
nullptr,
library_path.c_str(),
namespace_type,
permitted_path.c_str(),
- parent_ns.get_native_bridge_ns());
-
+ native_bridge_parent_namespace);
if (ns == nullptr) {
*error_msg = NativeBridgeGetError();
- return false;
+ return nullptr;
}
native_bridge_namespace_t* vendor_ns = NativeBridgeGetVendorNamespace();
if (!NativeBridgeLinkNamespaces(ns, nullptr, system_exposed_libraries.c_str())) {
*error_msg = NativeBridgeGetError();
- return false;
+ return nullptr;
}
if (!vendor_public_libraries_.empty()) {
if (!NativeBridgeLinkNamespaces(ns, vendor_ns, vendor_public_libraries_.c_str())) {
*error_msg = NativeBridgeGetError();
- return false;
+ return nullptr;
}
}
@@ -320,24 +322,19 @@
namespaces_.push_back(std::make_pair(env->NewWeakGlobalRef(class_loader), native_loader_ns));
- *ns = native_loader_ns;
- return true;
+ return &(namespaces_.back().second);
}
- bool FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader, NativeLoaderNamespace* ns) {
+ NativeLoaderNamespace* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
auto it = std::find_if(namespaces_.begin(), namespaces_.end(),
[&](const std::pair<jweak, NativeLoaderNamespace>& value) {
return env->IsSameObject(value.first, class_loader);
});
if (it != namespaces_.end()) {
- if (ns != nullptr) {
- *ns = it->second;
- }
-
- return true;
+ return &it->second;
}
- return false;
+ return nullptr;
}
void Initialize() {
@@ -557,24 +554,23 @@
return env->CallObjectMethod(class_loader, get_parent);
}
- bool FindParentNamespaceByClassLoader(JNIEnv* env,
- jobject class_loader,
- NativeLoaderNamespace* ns) {
+ NativeLoaderNamespace* FindParentNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
jobject parent_class_loader = GetParentClassLoader(env, class_loader);
while (parent_class_loader != nullptr) {
- if (FindNamespaceByClassLoader(env, parent_class_loader, ns)) {
- return true;
+ NativeLoaderNamespace* ns;
+ if ((ns = FindNamespaceByClassLoader(env, parent_class_loader)) != nullptr) {
+ return ns;
}
parent_class_loader = GetParentClassLoader(env, parent_class_loader);
}
- return false;
+ return nullptr;
}
bool initialized_;
- std::vector<std::pair<jweak, NativeLoaderNamespace>> namespaces_;
+ std::list<std::pair<jweak, NativeLoaderNamespace>> namespaces_;
std::string system_public_libraries_;
std::string vendor_public_libraries_;
std::string oem_public_libraries_;
@@ -614,7 +610,6 @@
std::lock_guard<std::mutex> guard(g_namespaces_mutex);
std::string error_msg;
- NativeLoaderNamespace ns;
bool success = g_namespaces->Create(env,
target_sdk_version,
class_loader,
@@ -622,8 +617,7 @@
is_for_vendor,
library_path,
permitted_path,
- &ns,
- &error_msg);
+ &error_msg) != nullptr;
if (!success) {
return env->NewStringUTF(error_msg.c_str());
}
@@ -649,43 +643,24 @@
}
std::lock_guard<std::mutex> guard(g_namespaces_mutex);
- NativeLoaderNamespace ns;
+ NativeLoaderNamespace* ns;
- if (!g_namespaces->FindNamespaceByClassLoader(env, class_loader, &ns)) {
+ if ((ns = g_namespaces->FindNamespaceByClassLoader(env, class_loader)) == nullptr) {
// This is the case where the classloader was not created by ApplicationLoaders
// In this case we create an isolated not-shared namespace for it.
- if (!g_namespaces->Create(env,
- target_sdk_version,
- class_loader,
- false /* is_shared */,
- false /* is_for_vendor */,
- library_path,
- nullptr,
- &ns,
- error_msg)) {
+ if ((ns = g_namespaces->Create(env,
+ target_sdk_version,
+ class_loader,
+ false /* is_shared */,
+ false /* is_for_vendor */,
+ library_path,
+ nullptr,
+ error_msg)) == nullptr) {
return nullptr;
}
}
- if (ns.is_android_namespace()) {
- android_dlextinfo extinfo;
- extinfo.flags = ANDROID_DLEXT_USE_NAMESPACE;
- extinfo.library_namespace = ns.get_android_ns();
-
- void* handle = android_dlopen_ext(path, RTLD_NOW, &extinfo);
- if (handle == nullptr) {
- *error_msg = dlerror();
- }
- *needs_native_bridge = false;
- return handle;
- } else {
- void* handle = NativeBridgeLoadLibraryExt(path, RTLD_NOW, ns.get_native_bridge_ns());
- if (handle == nullptr) {
- *error_msg = NativeBridgeGetError();
- }
- *needs_native_bridge = true;
- return handle;
- }
+ return OpenNativeLibrary(ns, path, needs_native_bridge, error_msg);
#else
UNUSED(env, target_sdk_version, class_loader);
@@ -741,18 +716,45 @@
}
#if defined(__ANDROID__)
+void* OpenNativeLibrary(NativeLoaderNamespace* ns, const char* path, bool* needs_native_bridge,
+ std::string* error_msg) {
+ if (ns->is_android_namespace()) {
+ android_dlextinfo extinfo;
+ extinfo.flags = ANDROID_DLEXT_USE_NAMESPACE;
+ extinfo.library_namespace = ns->get_android_ns();
+
+ void* handle = android_dlopen_ext(path, RTLD_NOW, &extinfo);
+ if (handle == nullptr) {
+ *error_msg = dlerror();
+ }
+ *needs_native_bridge = false;
+ return handle;
+ } else {
+ void* handle = NativeBridgeLoadLibraryExt(path, RTLD_NOW, ns->get_native_bridge_ns());
+ if (handle == nullptr) {
+ *error_msg = NativeBridgeGetError();
+ }
+ *needs_native_bridge = true;
+ return handle;
+ }
+}
+
// native_bridge_namespaces are not supported for callers of this function.
// This function will return nullptr in the case when application is running
// on native bridge.
android_namespace_t* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
std::lock_guard<std::mutex> guard(g_namespaces_mutex);
- NativeLoaderNamespace ns;
- if (g_namespaces->FindNamespaceByClassLoader(env, class_loader, &ns)) {
- return ns.is_android_namespace() ? ns.get_android_ns() : nullptr;
+ NativeLoaderNamespace* ns = g_namespaces->FindNamespaceByClassLoader(env, class_loader);
+ if (ns != nullptr) {
+ return ns->is_android_namespace() ? ns->get_android_ns() : nullptr;
}
return nullptr;
}
+NativeLoaderNamespace* FindNativeLoaderNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
+ std::lock_guard<std::mutex> guard(g_namespaces_mutex);
+ return g_namespaces->FindNamespaceByClassLoader(env, class_loader);
+}
#endif
}; // android namespace
